Huawei MU609 - Circuit Recommended for the UART Interface; USB Interface

HUAWEI MU609 HSPA LGA Module
Hardware Guide
Description of the Application Interfaces
Issue 04 (2016-12-12)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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3.5.2 Circuit Recommended for the UART Interface
Figure 3-12 Connection of the UART interface in the MU609 module (DCE) with the host
(DTE)
The RS-232 chip can be used to connect the MU609 module with UART. In this
connection, the Complementary Metal Oxide Semiconductor (CMOS) logic level and
the Electronic Industries Association (EIA) level are converted mutually. For example,
it is recommended that you use the MAX218 chip (The MAX218’s max baud is
120000 bit/s) with a 2-wire serial port.

It is recommended that set the pins related to UART interface as test points on the DTE
board for debugging.

When you want the module to be in sleep status, UART0_RX and UART1_RX must be
pulled down.

The level of RS-232 transceivers must match that of the MU609 module.
3.6 USB Interface
The MU609 is compliant with USB 2.0 High speed protocol. The USB interface is
powered directly from the VBAT supply. The USB signal lines are compatible with the
USB 2.0 signal specifications. Figure 3-13 shows the circuit of the USB interface.
Table 3-9 Definition of the USB interface
PIN No.
Pin Name
Pad Type
Description
85
USB_DM
I/O
USB data signal D-
86
USB_DP
I/O
USB data signal D+